could cesium add the technique "_3DTILESDIFFUSE" when using extension "KHR_materials_pbrSpecularGlossiness"

[hanaimin]

Hi,
I generate my glTF material with "KHR_materials_pbrSpecularGlossiness" extension. but this extension not allow using "Cesium.Cesium3DTileColorBlendMode.REPLACE" because of no "_3DTILESDIFFUSE" generated automaticaly.

the processPbrMaterials.js code logic may be here:
var baseColorUniform = defaultValue(techniqueUniforms.u_baseColorTexture, techniqueUniforms.u_baseColorFactor);
if (defined(baseColorUniform)) {
baseColorUniform.semantic = '_3DTILESDIFFUSE';
}

Could cesium add the feature for supporting "Replace" color blend mode when using "KHR_materials_pbrSpecularGlossiness" extension?

[OmarShehata]

This sounds like it should be an easy fix that should have gone in the initial spec gloss PR #7006.

@hanaimin if you can put together a Sandcastle example testing this, and open a PR to fix it, we'd be happy to review it!

[j9liu]

I'm closing this issue since Model no longer supports techniques as of the 1.97 release.